// Copyright (c) 1996-99 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies.  This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason.  IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package org.tigris.gef.undo;

import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Icon;

/**
 * A base class for all undoable Actions
 */
public abstract class UndoableAction extends AbstractAction {

    /**
     * @see javax.swing.AbstractAction.AbstractAction()
     */
    public UndoableAction() {
        super();
    }

    /**
     * @see javax.swing.AbstractAction.AbstractAction(java.lang.String)
     */
    public UndoableAction(String name) {
        super(name);
    }

    /**
     * @see javax.swing.AbstractAction.AbstractAction( java.lang.String,
     *      javax.swing.Icon)
     */
    public UndoableAction(String name, Icon icon) {
        super(name, icon);
    }

    /**
     * Signals that a chain of mementos are about to start for a single user
     * interaction.
     */
    public void actionPerformed(ActionEvent e) {
        UndoManager.getInstance().startChain();
    }
} /* end class AlignAction */
